Quote: ".....probably to my assumption there was a class action lawsuit against my employer."
I would suspect not, actually. There are quite a number of employers who will take advantage of this particular thing, that they can ask you to work any darn hours they want to as long as they pay you correctly. The only thing that restricts them from doing it is that in many cases, especially in times like this of labor shortages, they can't find enough good people who are willing to do this kind of terrible schedule. Famously in the construction industry these employers have a policy that you work the way we work till you can't take it anymore, and then you quit. Bye. Come back again when you're desperate, we'll let you continue to work yourself to death at our convenience. The problem with this is that unless other jobs are really hard to find, the best people who can will leave.
From the sound of it, you're not really having to do anything strenuous by having to work all these hours, you're not doing anything where loss of awareness or fatigue would lead to really unsafe working conditions, so even an OSHA violation isn't going to be a possible issue.
And if you are fired (quite legally) for refusing overtime, you will be unlikely to qualify for unemployment insurance, either. If you quit, make sure you have requested less overtime as often as possible before you quit, have tried to work the situation out before leaving. Or that you have another job already lined up.

